Abstract
We prepared (H3NC8H16NH3)PbBr4 (1–8DIO), (H3NC10H20NH3)PbBr4 (1–10DID), and (H3NC12H24NH3)PbBr4 (1-12DIDD) crystals, and evaluated the photoluminescence (PL) and scintillation characteristics. A luminescence peak derived from free excitons was detected at around 400 nm from the crystals in the PL spectra, and the quantum yields were 8% (1-8DIO), 13% (1-10DID), and 7% (1-12DIDD). Also, scintillation light yields were determined to be 5070 photons MeV–1 for the 1-8DIO crystal, 2400 photons MeV–1 for the 1-10DID crystal, and 830 photons MeV–1 for the 1-12DIDD crystal, and they had a fast scintillation decay time of 4.8 ns (1-8DIO), 6.8 ns (1-10DID), and 3.1 ns (1-12DIDD) owing to the free exciton emissions.
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